Only engine trade on the VIP prep cleared for ground running and hence why I was on it, aircraft required oils re-establishing before departure (every 28 days), ATC was not required for permission for ground runs, they were simply notified as a courtesy over the radio or if we required fire cover for high power runs. Eng ops was, but it was a Royal flight and required, so it was the only real dispensation you could normally get, unless we carried out a parallel start with a departing jet out of hours, which we often did at night.
What an utterly childish display of petulance.
Really, rather like the Phantom at Saints between the sheds, where some poor sod broke a leg because of it, or the Jaguar at Colt on the taxyway that nearly hit a car.... shall I go on, mine made a noise and gave God something better to listen too than the padre droning on, theirs nearly killed people!